.main{
    padding: 10px 10px;
    box-sizing: border-box;
    background-color: rgb(247, 247, 247);
    width: 90vw;
    margin-left: 10px;
}
.main h2{
    font-size: 16px;
    margin-bottom: 20px;
}
.item{
    width: 20%;
    height: 30px;
    line-height: 30px;
    display: inline-block;
    text-align: center;
    background-color: white;
    margin-right: 10px;
    border: 1px solid gray;
    border-radius: 5px;
    margin-bottom: 20px;
}
#active{
    background-color: rgb(241, 246, 249);
    border: 1px solid rgb(64, 158, 255);
}
.box{
    position: relative;
}
.footer{
    position: fixed;
    bottom: 0;
    width: 100%;
    height: 35px;
    background-color: white;
    border-top: 1px solid gray;
    text-align: center;
}
.footer button{
    width: 60%;
    height: 30px;
    background-color: rgb(64, 158, 255);
    color: white;
    border: none;
    border-radius: 5px;
    margin-left: 10px;
}

